Mammals of the WorldMammals of the World: A Photo Database of Every Mammal Species
Mammals are far more diverse than most people realize. Scientists currently recognize roughly 6,871 living species, grouped into about 27 orders and 167 families — from bats (Chiroptera) and rodents (Rodentia), the two largest orders by far, to small, specialized groups like pangolins (Pholidota) and aardvarks (Tubulidentata). Each family shares a distinct evolutionary history, from whales and dolphins (Cetacea) to primates, carnivores, and marsupials, and new species are still being described every year.
This site exists to build a free, open, photo-referenced database of that diversity. We're using it as the reference library for a mammal identification field guide app — the more species that have verified photos attached, the better that app can recognize mammals from a photo in the field. Browse the full species list below, search by common name, scientific name, order, family, or genus, and if you have a photo of a mammal you've encountered, upload it to help fill in the gaps.
Arabian Oryx
Oryx leucoryx
White-bellied Marsh Rice Rat
Oryzomys albiventer
Jamaican Rice Rat
Oryzomys antillarum
Coues's Marsh Rice Rat
Oryzomys couesi
Nicaraguan Marsh Rice Rat
Oryzomys dimidiatus
Xochimilco Marsh Rice Rat
Oryzomys fulgens
Gorgas's Marsh Rice Rat
Oryzomys gorgasi
Mexican Marsh Rice Rat
Oryzomys mexicanus
Tres Marías Rice Rat
Oryzomys nelsoni
Northeastern Marsh Rice Rat
Oryzomys palustris
Lower California Rice Rat
Oryzomys peninsulae
Northwestern Marsh Rice Rat
Oryzomys texensis
Mole-like Rice Tenrec
Oryzorictes hova
Four-toed Rice Tenrec
Oryzorictes tetradactylus
Osgood's Deermouse
Osgoodomys banderanus
Antilopine Wallaroo
Osphranter antilopinus
Black Wallaroo
Osphranter bernardus
Common Wallaroo
Osphranter robustus
Red Kangaroo
Osphranter rufus
South American Sea Lion
Otaria flavescens
Pallas's Cat
Otocolobus manul
Bat-eared Fox
Otocyon megalotis
Long-eared Gymnure
Otohylomys megalotis
Thick-tailed Greater Galago
Otolemur crassicaudatus
Garnett's Greater Galago
Otolemur garnettii
Java Giant Mastiff Bat
Otomops formosus
Harrison's Giant Mastiff Bat
Otomops harrisoni
Johnstone's Giant Mastiff Bat
Otomops johnstonei
Madagascar Giant Mastiff Bat
Otomops madagascariensis
Large-eared Giant Mastiff Bat
Otomops martiensseni
Papuan Giant Mastiff Bat
Otomops papuensis
Mantled Giant Mastiff Bat
Otomops secundus
Wroughton's Giant Mastiff Bat
Otomops wroughtoni
Angolan Vlei Rat
Otomys anchietae
Angoni Vlei Rat
Otomys angoniensis
South East African Vlei Rat
Otomys auratus
Barbour's Vlei Rat
Otomys barbouri
Brants's Whistling Rat
Otomys brantsii
Burton's Vlei Rat
Otomys burtoni
Cheesman's Vlei Rat
Otomys cheesmani
Cuanza Vlei Rat
Otomys cuanzensis
Rwenzori Vlei Rat
Otomys dartmouthi
Dent's Vlei Rat
Otomys denti
Dollman's Vlei Rat
Otomys dollmani
Charada Vlei Rat
Otomys fortior
Heller's Vlei Rat
Otomys helleri
Southern African Vlei Rat
Otomys irroratus
Mount Elgon Vlei Rat
Otomys jacksoni
Fynbos Vlei Rat
Otomys karoensis
Tanzanian Vlei Rat
Otomys lacustris
KwaZulu Natal Vlei Rat
Otomys laminatus
Littledale's Whistling Rat
Otomys littledalei
Western Vlei Rat
Otomys occidentalis
Afroalpine Vlei Rat
Otomys orestes
Simien Vlei Rat
Otomys simiensis
Sloggett's Vlei Rat
Otomys sloggetti
Eastern Arc Vlei Rat
Otomys sungae
Thomas's Vlei Rat
Otomys thomasi
East African Vlei Rat
Otomys tropicalis
Ethiopian Vlei Rat
Otomys typus